Improvement in machines for corrugating metals



Jomv MOFFET, on

NEW YORK, N. Y.

IMPROVEMENT IN MACHINES FO R CORRUGATING METALS.

Specification forming part of Letters Patent No. 129,290, dated July 16,1872.

Specification describing a new and Improved Machine for GorrugatingIron, invented by JOHN MOFFET, of New York, in the county and State ofNew York.

My invention consists of a set of preparatory dies and a set offinishing-dies for making square corrugations, whereby the saidcorrugations are formed by a preparatory operation, in which a set ofoval dies form an oval groove in the iron about as deep as the finishedgroove isto be, and then said groove completed by an operation of thefinishingdies acting upon the metal previously formed by the preparatorydies, and brought to the complete form required. The arrangement is suchthat the finishing-dies are brought into action first and complete acorrugation in a manner that cannot be done by the ordinary machines, inwhich only one set of corrugating-dies is used.

Figure 1 is a front elevation of my improved machine. Fig. 2 is across-section on the line a; w of Fig. 1. Fig. 3 is a plan view. Fig. 4is a section on the line 3 y of Fig. 2, and Fig. 5 is an edge view of asheet of metal partly corrugated.

Similar letters of reference indicate corresponding parts.

A represents a strong beam of metal on the top of a frame, B; or it maybe a. bed-piece of any suitable form or arrangement, with a long ovalgroove, O, in its face, and another square groove, D, parallel with O,and arranged as far from it as the width of the grooves of thecorrugations isto be. The said grooves O and D are to be nearly equal incapacity, but not quite equal in depth, for the oval form of grooveOrequires it to be a little deeper than D in order to contain exactlythe same quantity of metal; hence the outer edges to of the walls ofsaid groove 0 extend a little beyond the corresponding edges of grooveD. E is a long oval die, being the counterpart of the groove 0, andarranged in guides F at its ends to work into and out of said groove forbending up the sheet d into the preparatory groove 0. G is a long squaredie, being the counten part of groove D, and arranged similarly to E, inways F, for sliding into and out of said groove D. The grooved beam Aand the dies E and G are as long as the width of the widest sheet ofmetal they are intended to corrugate, or a little longer, so that saidsheet can be passed along between them. The said dies are mounted on theupper ends of the toggle.

jointed arms H I, whose lower ends are jointed to the frame at K, and attheir joints said bars are provided with a friction-roller, L M,respectively.

The cam N acts upon roller L of the arms H, and forces the die Gup intogroove D, and the cafibforces the die E up to its groove. Said dies areforced down by the springs P, but the togglejointed arms are thrownofftheir centers first by the tappets J. It will be seen that the camNis arranged to'force the finishing-die G up a little in advance of thedie E and to hold it until E has begun to move down again. Thus, whenthe final action' upon the corrugation takes place, to complete the formthe sheet is free to be centered in the finishing-dies, so that thepreparatory form 6 will merge harmoniously into the finished shape f,and will then be firmly retained, so that the subsequent action of thepreparatory die will not draw the stock back and disfigure the completedcorrugation as when a single set of dies is used to make thecorrugations complete at one operation. The sheet is moved along theextent of one groove at each operation of the dies above said dies, andits adjustment is facilitated-by the dropping of the oval groove 0 onthe top of die G.

Having thus'described my invention, I claim as new and desire to secureby Letters Patcut-- The beam A provided with the oval groove 0, and therectangular groove D parallel thereto, in combination with the long ovaldie E and rectangular die G, all arranged to make first an oval and thena rectangular corrugation, as set forth.

JOHN MOFFET. Witnesses: T. B. Mosnnn, W. A. GRAHAib UNITED STATES PATENTOFFICE.

